Refactor Terraform workflow to use environment variable for GCP credentials and remove path restriction on push events

Author: max-ostapenko

.github/workflows/infra.yaml

@@ -4,8 +4,6 @@ on:
   push:
     branches:
       - main
-    paths:
-      - "infra/**"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -19,6 +17,9 @@ jobs:
     name: Terraform
     runs-on: ubuntu-latest
 
+    env:
+      GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v6
@@ -29,7 +30,7 @@ jobs:
         uses: google-github-actions/auth@v3
         with:
           project_id: "httparchive"
-          credentials_json: "${{ secrets.GCP_SA_KEY }}"
+          credentials_json: ${{ env.GCP_SA_KEY }}
 
       - name: Set up Terraform
         uses: hashicorp/setup-terraform@v3.1.2